Nio Strategic Metals metallurgical study lifts Oka pyrochlore concentrate grade to 52.75% Nb2O5

• Nio Strategic Metals released results from an IGS metallurgical study outlining a revised development plan for its Oka niobium-REE deposit.
• Flotation tests produced a pyrochlore concentrate grading 52.75% Nb2O5 with 81.14% niobium recovery, versus 44.5% at 71.7% in 2011 work.
• Concentrate contained 11.75% TREO, mainly cerium oxide, with smaller neodymium and praseodymium fractions.
• Study assessed hydrometallurgical recovery of REE, niobium, tantalum, zirconium; recommended further testing to monetize phosphate by-product.
• Leach tests cut thorium to 824 ppm from 2,000 ppm; uranium to 120 ppm from 1,000 ppm, targeting lower residue environmental risk.

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